Which Is TRUE About the Initial Segment of an Axon

question 87

Multiple Choice

Which is TRUE about the initial segment of an axon?

• A) Its membrane potential at threshold is more positive than that of the cell body and dendrites.
• B) Its membrane potential at threshold is more negative than that of the cell body and dendrites.
• C) Synapses far from the initial segment are more effective in influencing whether an action potential will be generated in the axon than are synapses close to the initial segment.
• D) It is the region where neurotransmitter vesicles are docked and ready to be released by exocytosis.
• E) It can only conduct graded potentials because it lacks voltage-gated Na⁺ channels.

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